631 lines
18 KiB
C
631 lines
18 KiB
C
/*
|
||
* tkBitmap.c --
|
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*
|
||
* This file maintains a database of read-only bitmaps for the Tk
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* toolkit. This allows bitmaps to be shared between widgets and
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* also avoids interactions with the X server.
|
||
*
|
||
* Copyright (c) 1990-1994 The Regents of the University of California.
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* Copyright (c) 1994-1996 Sun Microsystems, Inc.
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*
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||
* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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||
*
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||
* SCCS: @(#) tkBitmap.c 1.45 97/07/24 17:27:38
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||
*/
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||
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#include "tkPort.h"
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#include "tkInt.h"
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||
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/*
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||
* The includes below are for pre-defined bitmaps.
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*
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* Platform-specific issue: Windows complains when the bitmaps are
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* included, because an array of characters is being initialized with
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* integers as elements. For lint purposes, the following pragmas
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* temporarily turn off that warning message.
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*/
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||
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#if defined(__WIN32__) || defined(_WIN32)
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#pragma warning (disable : 4305)
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#endif
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||
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||
#include "error.bmp"
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#include "gray12.bmp"
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#include "gray25.bmp"
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#include "gray50.bmp"
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#include "gray75.bmp"
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#include "hourglass.bmp"
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#include "info.bmp"
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#include "questhead.bmp"
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#include "question.bmp"
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#include "warning.bmp"
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||
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||
#if defined(__WIN32__) || defined(_WIN32)
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#pragma warning (default : 4305)
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||
#endif
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||
|
||
/*
|
||
* One of the following data structures exists for each bitmap that is
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* currently in use. Each structure is indexed with both "idTable" and
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* "nameTable".
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||
*/
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||
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typedef struct {
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||
Pixmap bitmap; /* X identifier for bitmap. None means this
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* bitmap was created by Tk_DefineBitmap
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* and it isn't currently in use. */
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||
int width, height; /* Dimensions of bitmap. */
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||
Display *display; /* Display for which bitmap is valid. */
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||
int refCount; /* Number of active uses of bitmap. */
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||
Tcl_HashEntry *hashPtr; /* Entry in nameTable for this structure
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* (needed when deleting). */
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} TkBitmap;
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||
|
||
/*
|
||
* Hash table to map from a textual description of a bitmap to the
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* TkBitmap record for the bitmap, and key structure used in that
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* hash table:
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||
*/
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||
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||
static Tcl_HashTable nameTable;
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typedef struct {
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Tk_Uid name; /* Textual name for desired bitmap. */
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||
Screen *screen; /* Screen on which bitmap will be used. */
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||
} NameKey;
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||
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/*
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* Hash table that maps from <display + bitmap id> to the TkBitmap structure
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* for the bitmap. This table is used by Tk_FreeBitmap.
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*/
|
||
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static Tcl_HashTable idTable;
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typedef struct {
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Display *display; /* Display for which bitmap was allocated. */
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Pixmap pixmap; /* X identifier for pixmap. */
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} IdKey;
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/*
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* Hash table create by Tk_DefineBitmap to map from a name to a
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* collection of in-core data about a bitmap. The table is
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* indexed by the address of the data for the bitmap, and the entries
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* contain pointers to TkPredefBitmap structures.
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||
*/
|
||
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Tcl_HashTable tkPredefBitmapTable;
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||
|
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/*
|
||
* Hash table used by Tk_GetBitmapFromData to map from a collection
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* of in-core data about a bitmap to a Tk_Uid giving an automatically-
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* generated name for the bitmap:
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||
*/
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||
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static Tcl_HashTable dataTable;
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typedef struct {
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char *source; /* Bitmap bits. */
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int width, height; /* Dimensions of bitmap. */
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} DataKey;
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||
|
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static int initialized = 0; /* 0 means static structures haven't been
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* initialized yet. */
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||
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/*
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* Forward declarations for procedures defined in this file:
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*/
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||
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static void BitmapInit _ANSI_ARGS_((void));
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||
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/*
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*----------------------------------------------------------------------
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||
*
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* Tk_GetBitmap --
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||
*
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* Given a string describing a bitmap, locate (or create if necessary)
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* a bitmap that fits the description.
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*
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||
* Results:
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* The return value is the X identifer for the desired bitmap
|
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* (i.e. a Pixmap with a single plane), unless string couldn't be
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* parsed correctly. In this case, None is returned and an error
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* message is left in interp->result. The caller should never
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* modify the bitmap that is returned, and should eventually call
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* Tk_FreeBitmap when the bitmap is no longer needed.
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*
|
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* Side effects:
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* The bitmap is added to an internal database with a reference count.
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* For each call to this procedure, there should eventually be a call
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* to Tk_FreeBitmap, so that the database can be cleaned up when bitmaps
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* aren't needed anymore.
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*
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*----------------------------------------------------------------------
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*/
|
||
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Pixmap
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Tk_GetBitmap(interp, tkwin, string)
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Tcl_Interp *interp; /* Interpreter to use for error reporting,
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* this may be NULL. */
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Tk_Window tkwin; /* Window in which bitmap will be used. */
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Tk_Uid string; /* Description of bitmap. See manual entry
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* for details on legal syntax. */
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{
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NameKey nameKey;
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IdKey idKey;
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Tcl_HashEntry *nameHashPtr, *idHashPtr, *predefHashPtr;
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register TkBitmap *bitmapPtr;
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TkPredefBitmap *predefPtr;
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int new;
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Pixmap bitmap;
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int width, height;
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int dummy2;
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if (!initialized) {
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BitmapInit();
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}
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nameKey.name = string;
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nameKey.screen = Tk_Screen(tkwin);
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nameHashPtr = Tcl_CreateHashEntry(&nameTable, (char *) &nameKey, &new);
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if (!new) {
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bitmapPtr = (TkBitmap *) Tcl_GetHashValue(nameHashPtr);
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bitmapPtr->refCount++;
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return bitmapPtr->bitmap;
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}
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/*
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* No suitable bitmap exists. Create a new bitmap from the
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* information contained in the string. If the string starts
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* with "@" then the rest of the string is a file name containing
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* the bitmap. Otherwise the string must refer to a bitmap
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* defined by a call to Tk_DefineBitmap.
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*/
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if (*string == '@') {
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Tcl_DString buffer;
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int result;
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if (Tcl_IsSafe(interp)) {
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Tcl_AppendResult(interp, "can't specify bitmap with '@' in a",
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" safe interpreter", (char *) NULL);
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goto error;
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}
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string = Tcl_TranslateFileName(interp, string + 1, &buffer);
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if (string == NULL) {
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goto error;
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}
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result = TkReadBitmapFile(Tk_Display(tkwin),
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RootWindowOfScreen(nameKey.screen), string,
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(unsigned int *) &width, (unsigned int *) &height,
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&bitmap, &dummy2, &dummy2);
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if (result != BitmapSuccess) {
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if (interp != NULL) {
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Tcl_AppendResult(interp, "error reading bitmap file \"", string,
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"\"", (char *) NULL);
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}
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Tcl_DStringFree(&buffer);
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goto error;
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}
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Tcl_DStringFree(&buffer);
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} else {
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predefHashPtr = Tcl_FindHashEntry(&tkPredefBitmapTable, string);
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if (predefHashPtr == NULL) {
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/*
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* The following platform specific call allows the user to
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* define bitmaps that may only exist during run time. If
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* it returns None nothing was found and we return the error.
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*/
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bitmap = TkpGetNativeAppBitmap(Tk_Display(tkwin), string,
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&width, &height);
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if (bitmap == None) {
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if (interp != NULL) {
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Tcl_AppendResult(interp, "bitmap \"", string,
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"\" not defined", (char *) NULL);
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}
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goto error;
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}
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} else {
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predefPtr = (TkPredefBitmap *) Tcl_GetHashValue(predefHashPtr);
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width = predefPtr->width;
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height = predefPtr->height;
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if (predefPtr->native) {
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bitmap = TkpCreateNativeBitmap(Tk_Display(tkwin),
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predefPtr->source);
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if (bitmap == None) {
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panic("native bitmap creation failed");
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}
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} else {
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bitmap = XCreateBitmapFromData(Tk_Display(tkwin),
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RootWindowOfScreen(nameKey.screen), predefPtr->source,
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(unsigned) width, (unsigned) height);
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}
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}
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}
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/*
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* Add information about this bitmap to our database.
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*/
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bitmapPtr = (TkBitmap *) ckalloc(sizeof(TkBitmap));
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bitmapPtr->bitmap = bitmap;
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bitmapPtr->width = width;
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bitmapPtr->height = height;
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bitmapPtr->display = Tk_Display(tkwin);
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bitmapPtr->refCount = 1;
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bitmapPtr->hashPtr = nameHashPtr;
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idKey.display = bitmapPtr->display;
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idKey.pixmap = bitmap;
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idHashPtr = Tcl_CreateHashEntry(&idTable, (char *) &idKey,
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&new);
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if (!new) {
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panic("bitmap already registered in Tk_GetBitmap");
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}
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Tcl_SetHashValue(nameHashPtr, bitmapPtr);
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Tcl_SetHashValue(idHashPtr, bitmapPtr);
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return bitmapPtr->bitmap;
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error:
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Tcl_DeleteHashEntry(nameHashPtr);
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||
return None;
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||
}
|
||
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/*
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*----------------------------------------------------------------------
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*
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* Tk_DefineBitmap --
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*
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* This procedure associates a textual name with a binary bitmap
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* description, so that the name may be used to refer to the
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* bitmap in future calls to Tk_GetBitmap.
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||
*
|
||
* Results:
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* A standard Tcl result. If an error occurs then TCL_ERROR is
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* returned and a message is left in interp->result.
|
||
*
|
||
* Side effects:
|
||
* "Name" is entered into the bitmap table and may be used from
|
||
* here on to refer to the given bitmap.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
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int
|
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Tk_DefineBitmap(interp, name, source, width, height)
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Tcl_Interp *interp; /* Interpreter to use for error reporting. */
|
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Tk_Uid name; /* Name to use for bitmap. Must not already
|
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* be defined as a bitmap. */
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char *source; /* Address of bits for bitmap. */
|
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int width; /* Width of bitmap. */
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int height; /* Height of bitmap. */
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{
|
||
int new;
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||
Tcl_HashEntry *predefHashPtr;
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||
TkPredefBitmap *predefPtr;
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||
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if (!initialized) {
|
||
BitmapInit();
|
||
}
|
||
|
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predefHashPtr = Tcl_CreateHashEntry(&tkPredefBitmapTable, name, &new);
|
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if (!new) {
|
||
Tcl_AppendResult(interp, "bitmap \"", name,
|
||
"\" is already defined", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
predefPtr = (TkPredefBitmap *) ckalloc(sizeof(TkPredefBitmap));
|
||
predefPtr->source = source;
|
||
predefPtr->width = width;
|
||
predefPtr->height = height;
|
||
predefPtr->native = 0;
|
||
Tcl_SetHashValue(predefHashPtr, predefPtr);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* Tk_NameOfBitmap --
|
||
*
|
||
* Given a bitmap, return a textual string identifying the
|
||
* bitmap.
|
||
*
|
||
* Results:
|
||
* The return value is the string name associated with bitmap.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
Tk_Uid
|
||
Tk_NameOfBitmap(display, bitmap)
|
||
Display *display; /* Display for which bitmap was
|
||
* allocated. */
|
||
Pixmap bitmap; /* Bitmap whose name is wanted. */
|
||
{
|
||
IdKey idKey;
|
||
Tcl_HashEntry *idHashPtr;
|
||
TkBitmap *bitmapPtr;
|
||
|
||
if (!initialized) {
|
||
unknown:
|
||
panic("Tk_NameOfBitmap received unknown bitmap argument");
|
||
}
|
||
|
||
idKey.display = display;
|
||
idKey.pixmap = bitmap;
|
||
idHashPtr = Tcl_FindHashEntry(&idTable, (char *) &idKey);
|
||
if (idHashPtr == NULL) {
|
||
goto unknown;
|
||
}
|
||
bitmapPtr = (TkBitmap *) Tcl_GetHashValue(idHashPtr);
|
||
return ((NameKey *) bitmapPtr->hashPtr->key.words)->name;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* Tk_SizeOfBitmap --
|
||
*
|
||
* Given a bitmap managed by this module, returns the width
|
||
* and height of the bitmap.
|
||
*
|
||
* Results:
|
||
* The words at *widthPtr and *heightPtr are filled in with
|
||
* the dimenstions of bitmap.
|
||
*
|
||
* Side effects:
|
||
* If bitmap isn't managed by this module then the procedure
|
||
* panics..
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_SizeOfBitmap(display, bitmap, widthPtr, heightPtr)
|
||
Display *display; /* Display for which bitmap was
|
||
* allocated. */
|
||
Pixmap bitmap; /* Bitmap whose size is wanted. */
|
||
int *widthPtr; /* Store bitmap width here. */
|
||
int *heightPtr; /* Store bitmap height here. */
|
||
{
|
||
IdKey idKey;
|
||
Tcl_HashEntry *idHashPtr;
|
||
TkBitmap *bitmapPtr;
|
||
|
||
if (!initialized) {
|
||
unknownBitmap:
|
||
panic("Tk_SizeOfBitmap received unknown bitmap argument");
|
||
}
|
||
|
||
idKey.display = display;
|
||
idKey.pixmap = bitmap;
|
||
idHashPtr = Tcl_FindHashEntry(&idTable, (char *) &idKey);
|
||
if (idHashPtr == NULL) {
|
||
goto unknownBitmap;
|
||
}
|
||
bitmapPtr = (TkBitmap *) Tcl_GetHashValue(idHashPtr);
|
||
*widthPtr = bitmapPtr->width;
|
||
*heightPtr = bitmapPtr->height;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_FreeBitmap --
|
||
*
|
||
* This procedure is called to release a bitmap allocated by
|
||
* Tk_GetBitmap or TkGetBitmapFromData.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The reference count associated with bitmap is decremented, and
|
||
* it is officially deallocated if no-one is using it anymore.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_FreeBitmap(display, bitmap)
|
||
Display *display; /* Display for which bitmap was
|
||
* allocated. */
|
||
Pixmap bitmap; /* Bitmap to be released. */
|
||
{
|
||
Tcl_HashEntry *idHashPtr;
|
||
register TkBitmap *bitmapPtr;
|
||
IdKey idKey;
|
||
|
||
if (!initialized) {
|
||
panic("Tk_FreeBitmap called before Tk_GetBitmap");
|
||
}
|
||
|
||
idKey.display = display;
|
||
idKey.pixmap = bitmap;
|
||
idHashPtr = Tcl_FindHashEntry(&idTable, (char *) &idKey);
|
||
if (idHashPtr == NULL) {
|
||
panic("Tk_FreeBitmap received unknown bitmap argument");
|
||
}
|
||
bitmapPtr = (TkBitmap *) Tcl_GetHashValue(idHashPtr);
|
||
bitmapPtr->refCount--;
|
||
if (bitmapPtr->refCount == 0) {
|
||
Tk_FreePixmap(bitmapPtr->display, bitmapPtr->bitmap);
|
||
Tcl_DeleteHashEntry(idHashPtr);
|
||
Tcl_DeleteHashEntry(bitmapPtr->hashPtr);
|
||
ckfree((char *) bitmapPtr);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_GetBitmapFromData --
|
||
*
|
||
* Given a description of the bits for a bitmap, make a bitmap that
|
||
* has the given properties. *** NOTE: this procedure is obsolete
|
||
* and really shouldn't be used anymore. ***
|
||
*
|
||
* Results:
|
||
* The return value is the X identifer for the desired bitmap
|
||
* (a one-plane Pixmap), unless it couldn't be created properly.
|
||
* In this case, None is returned and an error message is left in
|
||
* interp->result. The caller should never modify the bitmap that
|
||
* is returned, and should eventually call Tk_FreeBitmap when the
|
||
* bitmap is no longer needed.
|
||
*
|
||
* Side effects:
|
||
* The bitmap is added to an internal database with a reference count.
|
||
* For each call to this procedure, there should eventually be a call
|
||
* to Tk_FreeBitmap, so that the database can be cleaned up when bitmaps
|
||
* aren't needed anymore.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
Pixmap
|
||
Tk_GetBitmapFromData(interp, tkwin, source, width, height)
|
||
Tcl_Interp *interp; /* Interpreter to use for error reporting. */
|
||
Tk_Window tkwin; /* Window in which bitmap will be used. */
|
||
char *source; /* Bitmap data for bitmap shape. */
|
||
int width, height; /* Dimensions of bitmap. */
|
||
{
|
||
DataKey nameKey;
|
||
Tcl_HashEntry *dataHashPtr;
|
||
Tk_Uid name;
|
||
int new;
|
||
char string[20];
|
||
static int autoNumber = 0;
|
||
|
||
if (!initialized) {
|
||
BitmapInit();
|
||
}
|
||
|
||
nameKey.source = source;
|
||
nameKey.width = width;
|
||
nameKey.height = height;
|
||
dataHashPtr = Tcl_CreateHashEntry(&dataTable, (char *) &nameKey, &new);
|
||
if (!new) {
|
||
name = (Tk_Uid) Tcl_GetHashValue(dataHashPtr);
|
||
} else {
|
||
autoNumber++;
|
||
sprintf(string, "_tk%d", autoNumber);
|
||
name = Tk_GetUid(string);
|
||
Tcl_SetHashValue(dataHashPtr, name);
|
||
if (Tk_DefineBitmap(interp, name, source, width, height) != TCL_OK) {
|
||
Tcl_DeleteHashEntry(dataHashPtr);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
return Tk_GetBitmap(interp, tkwin, name);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* BitmapInit --
|
||
*
|
||
* Initialize the structures used for bitmap management.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Read the code.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
BitmapInit()
|
||
{
|
||
Tcl_Interp *dummy;
|
||
|
||
dummy = Tcl_CreateInterp();
|
||
initialized = 1;
|
||
Tcl_InitHashTable(&nameTable, sizeof(NameKey)/sizeof(int));
|
||
Tcl_InitHashTable(&dataTable, sizeof(DataKey)/sizeof(int));
|
||
Tcl_InitHashTable(&tkPredefBitmapTable, TCL_ONE_WORD_KEYS);
|
||
|
||
/*
|
||
* The call below is tricky: can't use sizeof(IdKey) because it
|
||
* gets padded with extra unpredictable bytes on some 64-bit
|
||
* machines.
|
||
*/
|
||
|
||
Tcl_InitHashTable(&idTable, (sizeof(Display *) + sizeof(Pixmap))
|
||
/sizeof(int));
|
||
|
||
Tk_DefineBitmap(dummy, Tk_GetUid("error"), (char *) error_bits,
|
||
error_width, error_height);
|
||
Tk_DefineBitmap(dummy, Tk_GetUid("gray75"), (char *) gray75_bits,
|
||
gray75_width, gray75_height);
|
||
Tk_DefineBitmap(dummy, Tk_GetUid("gray50"), (char *) gray50_bits,
|
||
gray50_width, gray50_height);
|
||
Tk_DefineBitmap(dummy, Tk_GetUid("gray25"), (char *) gray25_bits,
|
||
gray25_width, gray25_height);
|
||
Tk_DefineBitmap(dummy, Tk_GetUid("gray12"), (char *) gray12_bits,
|
||
gray12_width, gray12_height);
|
||
Tk_DefineBitmap(dummy, Tk_GetUid("hourglass"), (char *) hourglass_bits,
|
||
hourglass_width, hourglass_height);
|
||
Tk_DefineBitmap(dummy, Tk_GetUid("info"), (char *) info_bits,
|
||
info_width, info_height);
|
||
Tk_DefineBitmap(dummy, Tk_GetUid("questhead"), (char *) questhead_bits,
|
||
questhead_width, questhead_height);
|
||
Tk_DefineBitmap(dummy, Tk_GetUid("question"), (char *) question_bits,
|
||
question_width, question_height);
|
||
Tk_DefineBitmap(dummy, Tk_GetUid("warning"), (char *) warning_bits,
|
||
warning_width, warning_height);
|
||
|
||
TkpDefineNativeBitmaps();
|
||
|
||
Tcl_DeleteInterp(dummy);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TkReadBitmapFile --
|
||
*
|
||
* Loads a bitmap image in X bitmap format into the specified
|
||
* drawable. This is equivelent to the XReadBitmapFile in X.
|
||
*
|
||
* Results:
|
||
* Sets the size, hotspot, and bitmap on success.
|
||
*
|
||
* Side effects:
|
||
* Creates a new bitmap from the file data.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
TkReadBitmapFile(display, d, filename, width_return, height_return,
|
||
bitmap_return, x_hot_return, y_hot_return)
|
||
Display* display;
|
||
Drawable d;
|
||
CONST char* filename;
|
||
unsigned int* width_return;
|
||
unsigned int* height_return;
|
||
Pixmap* bitmap_return;
|
||
int* x_hot_return;
|
||
int* y_hot_return;
|
||
{
|
||
char *data;
|
||
|
||
data = TkGetBitmapData(NULL, NULL, (char *) filename,
|
||
(int *) width_return, (int *) height_return, x_hot_return,
|
||
y_hot_return);
|
||
if (data == NULL) {
|
||
return BitmapFileInvalid;
|
||
}
|
||
|
||
*bitmap_return = XCreateBitmapFromData(display, d, data, *width_return,
|
||
*height_return);
|
||
|
||
ckfree(data);
|
||
return BitmapSuccess;
|
||
}
|